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JP5044168B2 - Airbag base fabric and airbag - Google Patents

Airbag base fabric and airbag Download PDF

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Publication number
JP5044168B2
JP5044168B2 JP2006227689A JP2006227689A JP5044168B2 JP 5044168 B2 JP5044168 B2 JP 5044168B2 JP 2006227689 A JP2006227689 A JP 2006227689A JP 2006227689 A JP2006227689 A JP 2006227689A JP 5044168 B2 JP5044168 B2 JP 5044168B2
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resin
fabric
airbag
base fabric
synthetic fiber
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JP2008050716A (en
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達郎 山田
尚邦 岩佐
明広 野形
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Seiren Co Ltd
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Seiren Co Ltd
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Priority to JP2006227689A priority Critical patent/JP5044168B2/en
Priority to EP20070806305 priority patent/EP2060672B1/en
Priority to CN2007800314789A priority patent/CN101506430B/en
Priority to US12/376,933 priority patent/US8722550B2/en
Priority to PCT/JP2007/066828 priority patent/WO2008023843A1/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23Inflatable members
    • B60R21/235Inflatable members characterised by their material
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06MTREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/37Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/643Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds containing silicon in the main chain
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06MTREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/693Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with natural or synthetic rubber, or derivatives thereof
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23Inflatable members
    • B60R21/235Inflatable members characterised by their material
    • B60R2021/23504Inflatable members characterised by their material characterised by material
    • B60R2021/23509Fabric
    • B60R2021/23514Fabric coated fabric
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/20Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
    • Y10T442/2139Coating or impregnation specified as porous or permeable to a specific substance [e.g., water vapor, air, etc.]
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/20Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
    • Y10T442/2631Coating or impregnation provides heat or fire protection

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Air Bags (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)

Description

本発明は、車両に装備され車両の衝突事故時、瞬時に膨出して乗員を保護するエアバッグに関するものであり、更に詳しくは、樹脂を付与した布帛を用いるエアバッグであって、難燃性、軽量、風合い、収納性に優れたエアバッグに関するものである。   The present invention relates to an airbag that is installed in a vehicle and instantly bulges to protect an occupant in the event of a vehicle collision, and more specifically, an airbag using a fabric to which resin is applied, and is flame retardant. The present invention relates to an air bag excellent in light weight, texture, and storability.

近年、各種交通機関、特に自動車の事故発生の際に、乗員の安全を確保するためのエアバッグ装置が種々開発され、その有用性が認識されて、自動車においては非常に高い割合で装備されるようになってきた。このエアバッグ装置は車輌の衝突などにおける急激な減速状態を検知するセンサー、センサーより信号を受けて高圧ガスを発生するインフレーター、インフレーターからの高圧ガスにより膨出・展開して乗員に与える衝撃を緩和するエアバッグ、及びエアバッグ装置が正常に機能しているか否かを判断する診断回路より構成されている。   In recent years, various types of airbag devices have been developed to ensure the safety of passengers in the event of accidents in various types of transportation, especially in automobiles, and their usefulness has been recognized. It has become like this. This airbag device detects a sudden deceleration state in a vehicle collision, etc., an inflator that generates a high-pressure gas in response to a signal from the sensor, and inflates and deploys the high-pressure gas from the inflator to mitigate the impact on the passenger And a diagnostic circuit that determines whether or not the airbag device is functioning normally.

該エアバッグに使用される材料としては様々な態様のものがあるが、例えば、ポリアミドなどの高強力長繊維織物にクロロプレンゴムなどの耐熱性エラストマーをコーティング処理した布帛材料がある。耐熱性エラストマーを布帛表面に塗布することにより、ポリアミド繊維布帛のみでは不足する耐熱性や難燃性、空気遮蔽性などの性能の向上を図るものである。このコーティング処理は、布帛の目ズレやホツレの防止にも大きく役立つものである。   There are various types of materials used for the airbag. For example, there is a fabric material obtained by coating a high-strength long fiber fabric such as polyamide with a heat-resistant elastomer such as chloroprene rubber. By applying a heat-resistant elastomer to the fabric surface, performance such as heat resistance, flame retardancy, and air shielding properties that are insufficient with only a polyamide fiber fabric is improved. This coating treatment is also very useful for preventing fabric misalignment and fraying.

しかしながら布帛にコーティング処理を施すことにより布帛材料が硬化してしまい、コンパクトに折り畳み難く、収納性の面で問題があった。また、耐熱性や難燃性、空気遮蔽性を満足するためには、布帛の単位面積あたりの耐熱性エラストマー塗布量が50g/m以上となり、エアバッグの重量が大きくなってしまうという問題もあった。 However, when the fabric is coated, the fabric material is cured, and it is difficult to fold it compactly. In addition, in order to satisfy heat resistance, flame retardancy, and air shielding properties, there is a problem that the heat-resistant elastomer application amount per unit area of the fabric is 50 g / m 2 or more and the weight of the airbag is increased. there were.

このような問題点を解消するために耐熱性エラストマーの塗布量を抑えたエアバッグ用基布が検討されており、例えば特許文献1には、エラストマー樹脂が織物を構成する織糸部1.0に対して、織物目合い部に3.0以上の膜厚比で偏在していることを特徴とするエアバッグが開示されている。しかし、収納性については改善されているものの、樹脂被膜と織物の接着性の面については十分とは言えず、更に、20g/m以下の低塗布量とした場合、この様に樹脂が偏在している状態では、難燃性を満足することは困難である。 In order to solve such problems, a base fabric for an air bag in which the application amount of a heat resistant elastomer is suppressed has been studied. For example, Patent Document 1 discloses a woven yarn portion 1.0 in which an elastomer resin constitutes a woven fabric. On the other hand, an airbag characterized by being unevenly distributed in the fabric mesh portion at a film thickness ratio of 3.0 or more is disclosed. However, although storage is improved, it cannot be said that the adhesiveness between the resin coating and the fabric is sufficient, and the resin is unevenly distributed in this way when the coating amount is 20 g / m 2 or less. In this state, it is difficult to satisfy the flame retardancy.

また、特許文献2には、繊維布帛からなるエアバッグ用基布において、該布帛の少なくとも片面が樹脂で被覆されており、かつ該布帛を構成する少なくとも一部の単糸が該樹脂で包囲されており、かつ該布帛を構成する少なくとも一部の単糸が該樹脂で包囲されていないことを特徴とするエアバッグ用基布が開示されている。収納性を改善しながら、樹脂被膜と織物の接着性を向上させたものとなっているが、難燃性の点では不十分であると言わざるを得ないのが実状である。   Further, in Patent Document 2, in an airbag base fabric made of a fiber fabric, at least one surface of the fabric is coated with a resin, and at least a part of a single yarn constituting the fabric is surrounded by the resin. In addition, an airbag base fabric is disclosed in which at least a part of a single yarn constituting the fabric is not surrounded by the resin. Although the adhesiveness between the resin film and the woven fabric is improved while improving the storage property, the fact is that it is inadequate in terms of flame retardancy.

特許第2853936号公報Japanese Patent No. 2853936 特開2004−124321号公報JP 2004-124321 A

本発明はかかる従来のエアバッグ用基布の欠点に鑑み、軽量・柔軟で収納性が高く、空気遮蔽性、耐熱性および難燃性を満足し、樹脂被膜と布帛との接着性に優れ、目ズレやホツレの起き難いエアバッグ用基布およびそれからなるエアバッグを提供するものである。   In light of the drawbacks of the conventional airbag fabric, the present invention is lightweight, flexible and highly storable, satisfying air shielding properties, heat resistance and flame retardancy, and excellent in adhesion between the resin coating and the fabric, It is an object of the present invention to provide an airbag base fabric that is less prone to eye misalignment and fraying and an airbag comprising the same.

本発明者らは上記の課題を解決すべく鋭意研究を重ねた結果、合成繊維織物の少なくとも一方の面が樹脂で被覆されたエアバッグ用基布において、合成繊維織物上の樹脂の分布状態をコントロールすることによって、樹脂の塗布量を極少量としながらも難燃性、接着性、空気遮蔽性および目ズレやホツレが起き難いエアバッグ用基布を得ることが出来ることを見い出し本発明を完成するに至った。   As a result of intensive studies to solve the above problems, the present inventors have determined the distribution of the resin on the synthetic fiber fabric in an airbag base fabric in which at least one surface of the synthetic fiber fabric is coated with a resin. By controlling, it was found that a base fabric for an air bag can be obtained, which has flame resistance, adhesion, air shielding properties, and is less likely to cause misalignment or fraying while minimizing the amount of resin applied. It came to do.

すなわち、合成繊維織物の少なくとも一方の面を樹脂で被覆する際に、該合成繊維織物の露出している表面部分のみならず、経糸と緯糸が交差している交絡部においても、その内側にまで樹脂を浸透させ、表面にある経糸または緯糸を取り除いた時に初めて表われる交絡部界面において、該樹脂が85%以上の面積比率で分布していることを特徴とするエアバッグ用基布である。ここで言う交絡部界面とは、織物の経糸と緯糸が交差して重なりあい、経糸と緯糸が接触している部分のことである。   That is, when covering at least one surface of the synthetic fiber fabric with the resin, not only the exposed surface portion of the synthetic fiber fabric but also the entangled portion where the warp and the weft intersect, The airbag fabric is characterized in that the resin is distributed in an area ratio of 85% or more at the interface of the entangled portion that appears for the first time when the resin is infiltrated and the warp or weft on the surface is removed. The interlaced part interface mentioned here is a part where the warp and the weft of the woven fabric intersect and overlap each other, and the warp and the weft are in contact with each other.

交絡部界面は通常の織物の状態では表面に露出することのない部分ではあるが、織物の特性について考察する場合、非常に重要な部分であると推察される。織物を形成している経糸と緯糸が接触している部分であり、織物の機械的特性に大きな影響があることはもちろんであるが、本発明者らはこの交絡部界面に十分な量の樹脂を分布させることによって、樹脂の総塗布量が極少量であっても高い難燃性を発揮させることが出来ることを見い出した。この交絡部界面における樹脂の面積比率が85%に満たない場合、目ズレが起き易くなり、難燃性や空気遮蔽性が不十分となる虞がある。   The interface between the entangled portions is a portion that is not exposed on the surface in a normal fabric state, but is considered to be a very important portion when considering the characteristics of the fabric. The warp and weft forming the woven fabric are in contact with each other, and of course there is a great influence on the mechanical properties of the woven fabric. It was found that high flame retardancy can be exhibited even if the total coating amount of the resin is extremely small by distributing the resin. When the area ratio of the resin at the interface of the entangled portion is less than 85%, misalignment is likely to occur, and the flame retardancy and air shielding properties may be insufficient.

樹脂の総塗布量を上げることで合成繊維織物の機械的特性を向上し、難燃性や空気遮蔽性を向上することは可能であるが、当然、織物の重量は重くなってしまい、風合いも悪いものとなり柔軟性も損なわれる。本発明は、樹脂の塗布量を20g/m以下とした場合に、特にその効果を奏する。 It is possible to improve the mechanical properties of synthetic fiber fabrics by increasing the total amount of resin applied, and to improve flame retardancy and air shielding properties, but naturally the weight of the fabric increases and the texture also It becomes bad and flexibility is lost. The present invention is particularly effective when the coating amount of the resin is 20 g / m 2 or less.

樹脂として、シリコーン化合物よりなるものを用いることが好ましい。   It is preferable to use a resin made of a silicone compound.

また、前記エアバッグ用基布を用いたエアバッグである。
また本発明は、合成繊維織物の少なくとも一方の面が樹脂で被覆されたエアバッグ用基布の製造方法であって、ナイフオンベッド方式により、挟み力0.5〜4.0N/cm、樹脂量20g/m 以下にて樹脂を塗布し、該合成繊維織物の経糸と緯糸が交差している交絡部界面において該樹脂が85%以上の面積比率で分布させるエアバッグ用基布の製造方法に関する。
Moreover, it is an airbag using the said base fabric for airbags.
The present invention also relates to a method for producing a base fabric for an air bag in which at least one surface of a synthetic fiber fabric is coated with a resin, wherein the sandwiching force is 0.5 to 4.0 N / cm by a knife-on-bed method. A method for producing a base fabric for an airbag, wherein a resin is applied in an amount of 20 g / m 2 or less, and the resin is distributed at an area ratio of 85% or more at the interface of the entangled portion where the warp and weft of the synthetic fiber fabric intersect. About.

本発明によれば、軽量・柔軟で収納性が高く、空気遮蔽性、耐熱性および難燃性を満足し、樹脂被膜と布帛との接着性に優れ、目ズレやホツレの起き難いエアバッグ用基布およびそれからなるエアバッグを提供できるので、エアバッグの普及促進に貢献でき、更にはエアバッグ装置の軽量化による自動車の低燃費化を可能とし、地球環境の保護にも貢献ができる。   According to the present invention, an air bag that is lightweight, flexible, highly packable, satisfies air shielding, heat resistance, and flame retardancy, has excellent adhesion between a resin coating and a fabric, and is less likely to cause misalignment or fraying. Since the base fabric and the airbag made of the same can be provided, it can contribute to the popularization and promotion of airbags, further reduce the fuel consumption of the automobile by reducing the weight of the airbag device, and contribute to the protection of the global environment.

本発明において合成繊維織物とは、合成繊維糸条を用いて製織される織物を意味する。織物は機械的強度に優れ、厚さを薄くできるという点で優れている。織物の組織は特に限定されるものでなく、平織、綾織、朱子織およびこれらの変化織、多軸織などを挙げることができる。なかでも、機械的強度により優れた平織物が特に好ましい。 In the present invention, the synthetic fiber fabric means a fabric woven using synthetic fiber yarns. Woven fabrics are excellent in that they have excellent mechanical strength and can be made thin. The structure of the woven fabric is not particularly limited, and examples thereof include plain weave, twill weave, satin weave, and their changed weave and multiaxial weave. Of these, a plain fabric excellent in mechanical strength is particularly preferable.

合成繊維糸条の種類は特に限定されるものでなく、例えば、ナイロン66、ナイロン6、ナイロン12、ナイロン46などのポリアミド繊維;ポリエチレンテレフタレート、ポリブチレンテレフタレートなどのポリエステル繊維;ポリエチレン、ポリプロピレンなどのポリオレフィン繊維;ポリビニルアルコール繊維;ポリ塩化ビニリデン繊維;ポリ塩化ビニル繊維;アクリルなどのポリアクリロニトリル系繊維;ポリウレタン繊維;芳香族ポリアミド繊維;ポリパラフェニレンベンゾビスオキサゾール(PBO)繊維などを挙げることができる。なかでも、製造が容易で、かつ耐熱性に優れるという理由により、ポリアミド繊維およびポリエステル繊維が好ましく、耐衝撃性に優れ、熱容量が大きいという理由によりポリアミド繊維がより好ましい。これらの合成繊維には、耐熱向上剤、酸化防止剤、難燃剤、帯電防止剤などを含有させてもよい。   The type of synthetic fiber yarn is not particularly limited, and examples thereof include polyamide fibers such as nylon 66, nylon 6, nylon 12, and nylon 46; polyester fibers such as polyethylene terephthalate and polybutylene terephthalate; polyolefins such as polyethylene and polypropylene Examples thereof include: fiber; polyvinyl alcohol fiber; polyvinylidene chloride fiber; polyvinyl chloride fiber; polyacrylonitrile fiber such as acrylic; polyurethane fiber; aromatic polyamide fiber; polyparaphenylene benzobisoxazole (PBO) fiber. Among them, polyamide fibers and polyester fibers are preferable because they are easy to manufacture and have excellent heat resistance, and polyamide fibers are more preferable because they are excellent in impact resistance and have a large heat capacity. These synthetic fibers may contain a heat resistance improver, an antioxidant, a flame retardant, an antistatic agent, and the like.

糸条の形態は特に限定されるものでなく、例えば、フィラメント糸、紡績糸、混紡糸、混繊糸、交撚糸、捲回糸などを挙げることができる。なかでも、生産性、コスト面、機械的強度に優れ、また、単糸の広がりにより低通気性が得られやすいという理由により無撚あるいは甘撚のフィラメント糸が好ましい。単糸(単繊維ともいう)の断面形状は特に限定されるものでなく、例えば、丸、扁平、三角、長方形、平行四辺形、中空、星型などを挙げることができる。生産性やコストの点では丸断面が好ましく、布帛の厚さを薄くできる為にエアバッグの収納性が良くなるという点では扁平断面が好ましい。   The form of the yarn is not particularly limited, and examples thereof include filament yarn, spun yarn, blended yarn, blended yarn, twisted yarn, and wound yarn. Of these, untwisted or sweet-twisted filament yarns are preferred because they are excellent in productivity, cost, and mechanical strength, and are easy to obtain low air permeability due to the spread of single yarns. The cross-sectional shape of the single yarn (also referred to as single fiber) is not particularly limited, and examples thereof include a round shape, a flat shape, a triangular shape, a rectangular shape, a parallelogram shape, a hollow shape, and a star shape. A round cross section is preferable from the viewpoint of productivity and cost, and a flat cross section is preferable from the viewpoint that the storage capacity of the airbag is improved because the thickness of the fabric can be reduced.

単糸強度は5.4g/dtex以上であることが好ましく、より好ましくは7.0g/dtex以上である。単糸強度が5.4g/dtex未満であると、エアバッグとしての物理的特性を満足することが困難となる虞がある。   The single yarn strength is preferably 5.4 g / dtex or more, more preferably 7.0 g / dtex or more. If the single yarn strength is less than 5.4 g / dtex, it may be difficult to satisfy the physical characteristics of the airbag.

糸条の総繊度は155〜470dtexであることが好ましく、より好ましくは235〜470dtexである。総繊度が155dtex未満であると、布帛の強度を維持することが困難となる虞がある。総繊度が470dtexを越えると、布帛の厚さが増大し、エアバッグの収納性が悪くなる虞がある。   The total fineness of the yarn is preferably 155 to 470 dtex, more preferably 235 to 470 dtex. If the total fineness is less than 155 dtex, it may be difficult to maintain the strength of the fabric. When the total fineness exceeds 470 dtex, the thickness of the fabric increases, and there is a possibility that the storage property of the airbag is deteriorated.

本発明において用いられる樹脂としては、耐熱性エラストマーが上げられるが、中でもシリコーン化合物が好ましく用いられる。シリコーン化合物は特に限定されるものでなく、例えば、ジメチルシリコーンゴム、メチルビニルシリコーンゴム、メチルフェニルシリコーンゴム、トリメチルシリコーンゴム、フロロシリコーンゴム、メチルシリコーンレジン、メチルフェニルシリコーンレジン、メチルビニルシリコーンレジン、アルキッド変性シリコーンレジン、エポキシ変性シリコーンレジン、アクリル変性シリコーンレジン、ポリエステル変性シリコーンレジンなどを挙げることができる。なかでも、硬化後にゴム弾性を有し、強度、伸び等に優れ、コスト面でも有利という理由によりメチルビニルシリコーンゴム等が好ましく用いられる。   As the resin used in the present invention, a heat-resistant elastomer can be raised, and among them, a silicone compound is preferably used. The silicone compound is not particularly limited. For example, dimethyl silicone rubber, methyl vinyl silicone rubber, methyl phenyl silicone rubber, trimethyl silicone rubber, fluoro silicone rubber, methyl silicone resin, methyl phenyl silicone resin, methyl vinyl silicone resin, alkyd Examples thereof include a modified silicone resin, an epoxy-modified silicone resin, an acrylic-modified silicone resin, and a polyester-modified silicone resin. Of these, methyl vinyl silicone rubber is preferably used because it has rubber elasticity after curing, is excellent in strength and elongation, and is advantageous in terms of cost.

シリコーン化合物は通常市販されているものを用いることができ、そのタイプは、無溶剤型、溶剤希釈型、水分散型など特に限定されない。   A commercially available silicone compound can be used, and the type is not particularly limited, such as a solventless type, a solvent dilution type, and a water dispersion type.

本発明においてシリコーン化合物には、シリコーン被膜硬化後の粘着性低減やシリコーン皮膜の補強などの目的で、ポリウレタン化合物、アクリル化合物、ポリエステル化合物など、他の高分子材料を含んでいてもよい。さらに、硬化剤、接着向上剤、充填剤、補強剤、顔料、難燃助剤などの添加剤を含んでいてもよい。   In the present invention, the silicone compound may contain other polymer materials such as a polyurethane compound, an acrylic compound, and a polyester compound for the purpose of reducing the adhesiveness after curing the silicone film and reinforcing the silicone film. Furthermore, additives such as a curing agent, an adhesion improver, a filler, a reinforcing agent, a pigment, and a flame retardant aid may be included.

合成繊維織物の少なくとも一方の面を樹脂で被覆する方法としては、コーティング方式が用いられる。中でも塗布用ナイフと台(ベッド)の間に合成繊維織物を挟みこんだ状態でコーティングを行う、所謂ナイフオンベッド方式が好ましい。ナイフオンベッド方式によれば、合成繊維織物の表裏両面から適度な圧力がかかることで交絡部への樹脂の浸透が促進され、交絡部界面における樹脂の面積比率を上げ易いものと考えられる。ナイフとベッドによる合成繊維織物の挟み力を0.5〜4.0N/cmとすることが好ましい。ここで挟み力とは、ナイフを合成繊維織物に押し付ける力を、合成繊維織物に接触しているナイフの幅で除したものである。挟み力が0.5N/cm未満の場合、樹脂の塗布量が多くなりすぎる虞があり、収納性・柔軟性が損なわれ、重量が重くなってしまう。挟み力が4.0N/cmを超えると、合成繊維織物の表面に、均一な樹脂被膜が形成されない虞がある。より好ましい挟み力は1.0〜3.0N/cmである。他のコーティング方式としては、コーティングを行う際の合成繊維織物の張力や、ナイフの刃圧を適宜調整する事で、フローティング方式を用いて製造することも可能である。   As a method of coating at least one surface of the synthetic fiber fabric with a resin, a coating method is used. In particular, a so-called knife-on-bed method is preferred in which coating is performed with a synthetic fiber fabric sandwiched between a coating knife and a table (bed). According to the knife-on-bed method, it is considered that resin penetration into the entangled portion is promoted by applying an appropriate pressure from both the front and back surfaces of the synthetic fiber fabric, and the area ratio of the resin at the entangled portion interface can be easily increased. It is preferable that the sandwiching force of the synthetic fiber fabric by the knife and the bed is 0.5 to 4.0 N / cm. Here, the pinching force is obtained by dividing the force pressing the knife against the synthetic fiber fabric by the width of the knife in contact with the synthetic fiber fabric. When the pinching force is less than 0.5 N / cm, there is a possibility that the amount of the resin applied will be too much, and the storage property and flexibility will be impaired, and the weight will become heavy. If the pinching force exceeds 4.0 N / cm, there is a possibility that a uniform resin film is not formed on the surface of the synthetic fiber fabric. A more preferable clamping force is 1.0 to 3.0 N / cm. As another coating method, it is also possible to manufacture using a floating method by appropriately adjusting the tension of the synthetic fiber fabric at the time of coating and the blade pressure of the knife.

ベッドの材質は特に限定されないが、天然ゴムや合成樹脂など適度な弾力を持つ素材が好ましい。中でも種々の硬度を持つものが容易に作成可能であるウレタン樹脂からなるものが好ましい。   The material of the bed is not particularly limited, but a material having an appropriate elasticity such as natural rubber or synthetic resin is preferable. Among these, those made of urethane resin that can be easily prepared having various hardnesses are preferable.

ナイフは金属製が好ましく、錆び難さや柔軟性・磨耗強さを考慮すると特にステンレス製が好ましい。ナイフの形状は特に限定されないが、合成繊維織物との接触部における刃の厚さが0.05〜0.5mmであることが好ましく、より好ましくは0.1〜0.2mmである。接触部における刃の厚さが0.5mmを超えると挟み力を大きくしても塗布量が多くなりすぎる虞があり、収納性・柔軟性が損なわれ、重量も重くなってしまう。刃の厚さが0.05mmに満たない場合、合成繊維織物との接触部である先端の刃の強度が不十分であり、折れ曲がりが発生して塗布量がばらついたり、スジやシワ、斑となったりする虞がある。   The knife is preferably made of metal, and stainless steel is particularly preferred in consideration of rust resistance, flexibility and wear strength. Although the shape of a knife is not specifically limited, It is preferable that the thickness of the blade in a contact part with a synthetic fiber fabric is 0.05-0.5 mm, More preferably, it is 0.1-0.2 mm. If the thickness of the blade at the contact portion exceeds 0.5 mm, the coating amount may increase too much even if the pinching force is increased, the storage property and flexibility are impaired, and the weight is also increased. If the thickness of the blade is less than 0.05 mm, the strength of the blade at the tip, which is the contact portion with the synthetic fiber fabric, is insufficient, the bending occurs, the coating amount varies, streaks, wrinkles, spots, etc. There is a risk of becoming.

以下、実施例により本発明を更に詳しく説明する。なお、実施例における各種評価は下記の方法に従って測定した。   Hereinafter, the present invention will be described in more detail with reference to examples. Various evaluations in the examples were measured according to the following methods.

(1)交絡部樹脂介在率:エアバッグ用基布の交絡部界面に分布している樹脂の面積比率である。エアバッグ用基布の経糸あるいは緯糸を引き抜き、露出した緯糸あるいは経糸の交絡部界面について、樹脂の塗布面から反射電子像(組成像)で撮影する。撮影には株式会社日立ハイテクノロジーズ製、走査電子顕微鏡S−3000Nを用いた。反射電子像では、樹脂付着面は輝度がより強く映るため、合成繊維面との識別が可能である。図1のAの部分がひとつの交絡部界面を示すものであるが、中央部の暗い部分には樹脂が存在していない。その両側では繊維間を樹脂が埋め尽くしているのがわかる。ひとつの交絡部界面の面積を100%とし、それに対して樹脂が付着している部分の面積比率を測定し、交絡部樹脂介在率(%)とする。ここで樹脂が付着している部分の面積とは、図1のAで示した交絡部界面のうち、繊維間を樹脂が埋め尽くしている部分の面積であり、すなわち、Aの中央部に見られる樹脂が存在していない部分の面積を交絡部界面の面積から差し引いたものである。経糸、緯糸につきそれぞれ5箇所を測定しその平均値をとった。   (1) Entangled part resin inclusion ratio: It is the area ratio of the resin distributed at the entangled part interface of the airbag fabric. The warp or weft of the airbag fabric is pulled out, and the exposed interlaced interface of the weft or warp is photographed as a reflected electron image (composition image) from the resin coating surface. A scanning electron microscope S-3000N manufactured by Hitachi High-Technologies Corporation was used for photographing. In the reflected electron image, the resin-attached surface has a higher brightness, and can be distinguished from the synthetic fiber surface. The portion A in FIG. 1 shows one entangled portion interface, but no resin is present in the dark portion at the center. It can be seen that the resin is filled between the fibers on both sides. The area of one entangled portion interface is set to 100%, and the area ratio of the portion where the resin is adhered to the area is measured to obtain the entangled portion resin inclusion ratio (%). Here, the area of the part where the resin adheres is the area of the part where the resin is completely filled between the fibers in the interlaced part interface shown by A in FIG. The area of the portion where no resin is present is subtracted from the area of the interlaced interface. Five points were measured for each of the warp and the weft, and the average value was taken.

(2)通気性:エアバッグ用基布の空気遮蔽性を評価するもので、JIS L 1096 8.27.1 A法(フラジール形法)にしたがって測定をした。   (2) Breathability: An air shielding property of an air bag base fabric is evaluated, and measured according to JIS L 1096 8.27.1 A method (fragile type method).

(3)滑脱抵抗力:エアバッグ用基布の目ズレ・ホツレの発生し易さの程度を評価する。測定試料の幅を1cmに変更して測定した以外は、JIS L1096 8.21.3 ピン引掛け法にしたがった。   (3) Sliding resistance: Evaluate the degree of occurrence of slippage and fraying of the airbag fabric. Except for changing the width of the measurement sample to 1 cm and performing the measurement, the JIS L1096 8.21.3 pin hooking method was followed.

(4)剛軟性:エアバッグ用基布の柔軟性を評価するもので、JIS L 1096 8.19.1 A法(45°カンチレバー法)にしたがって測定をした。   (4) Flexibility: The flexibility of an airbag base fabric is evaluated, and measured according to JIS L 1096 8.19.1 A method (45 ° cantilever method).

(5)難燃性:FMVSS302に規定される方法により燃焼速度[mm/min.]を測定し、これをもって評価した。   (5) Flame retardancy: burning rate [mm / min. ] Were measured and evaluated with this.

[実施例1]
丸断面のナイロン66繊維、470dtex/72フィラメントの糸を経糸および緯糸として製織し、経糸と緯糸の織密度がともに46本/2.54cmの平織の織物を得た。次いでこの織物を経糸と緯糸の織密度がともに46本/2.54cmを保持するようにして定法により精練、熱セットをおこなった。次に、粘度15,000mPa・sの無溶剤系シリコーン樹脂にて、接触部における刃の厚さ0.1mmのステンレス製ナイフとウレタン製ベッドを用いて、挟み力2.5N/cmで押し付けてコーティングをおこなった。その後ピンテンター乾燥機を用いて180℃、60秒で熱処理をし、樹脂塗布量が12g/mのエアバッグ用基布を得た。得られたエアバッグ用基布は、経糸と緯糸が交差する交絡部界面において、樹脂の占める面積比率が95%であり、12g/mの低塗布量でありながら、難燃性・滑脱抵抗力・柔軟性・空気遮断性に優れたものであった。
[Example 1]
Nylon 66 fibers having a round cross section and 470 dtex / 72 filament yarn were woven as warps and wefts to obtain a plain weave fabric in which the weft and weft density was 46 / 2.54 cm. Next, this fabric was scoured and heat-set by a conventional method so that the woven density of warp and weft was both 46 / 2.54 cm. Next, it was pressed with a solvent-free silicone resin having a viscosity of 15,000 mPa · s with a sandwiching force of 2.5 N / cm using a stainless steel knife and a urethane bed with a blade thickness of 0.1 mm at the contact portion. Coating was performed. Thereafter, heat treatment was performed at 180 ° C. for 60 seconds using a pin tenter dryer to obtain an air bag base fabric having a resin coating amount of 12 g / m 2 . The obtained airbag fabric has an area ratio of 95% of the resin at the interface of the entangled portions where the warp and the weft intersect, and has a low coating amount of 12 g / m 2. It was excellent in strength, flexibility, and air barrier properties.

[実施例2]
実施例1で製織、精練、熱セットを行った織物と同じ織物を用いて、接触部における刃の厚さ0.2mmのステンレス製ナイフを用い、挟み力を0.6N/cmとした以外は、実施例と同じ条件にてコーティングを行った。その後の熱処理も実施例1と同条件である。こうして得られたエアバッグ用基布は、樹脂塗布量が18g/mであり、経糸と緯糸が交差する交絡部界面において、樹脂の占める面積比率が100%であった。このエアバッグ用基布は難燃性・滑脱抵抗力・柔軟性・空気遮断性に優れたものであった。
[Example 2]
Using the same woven fabric that was woven, scoured, and heat-set in Example 1, using a stainless steel knife with a blade thickness of 0.2 mm at the contact portion, except that the pinching force was 0.6 N / cm The coating was performed under the same conditions as in the examples. The subsequent heat treatment is also under the same conditions as in Example 1. The thus obtained airbag base fabric had a resin coating amount of 18 g / m 2 , and the area ratio of the resin at the entangled interface where the warp and the weft intersected was 100%. This airbag fabric was excellent in flame retardancy, sliding resistance, flexibility, and air barrier properties.

[実施例3]
丸断面のナイロン66繊維、470dtex/72フィラメントの糸を経糸および緯糸として製織し、経糸と緯糸の織密度がともに53本/2.54cmの平織の織物を得た。次いでこの織物を経糸と緯糸の織密度がともに53本/2.54cmを保持するようにして熱セットをおこなった。次に、粘度15,000mPa・sの無溶剤系シリコーン樹脂にて、接触部における刃の厚さ0.1mmのステンレス製ナイフとウレタン製ベッドを用いて、挟み力2.5N/cmで押し付けてコーティングをおこなった。その後ピンテンター乾燥機を用いて180℃、60秒で熱処理をし、樹脂塗布量が15g/mのエアバッグ用基布を得た。得られたエアバッグ用基布は、経糸と緯糸が交差する交絡部界面において、樹脂の占める面積比率が89%であり、15g/mの低塗布量でありながら、難燃性・滑脱抵抗力・柔軟性・空気遮断性に優れたものであった。
[Example 3]
Nylon 66 fibers having a round cross section and 470 dtex / 72 filament yarn were woven as warps and wefts to obtain a plain weave fabric in which the weft and weft density was 53 / 2.54 cm. The fabric was then heat set so that the weft density of the warp and weft was 53 / 2.54 cm. Next, it was pressed with a solvent-free silicone resin having a viscosity of 15,000 mPa · s with a sandwiching force of 2.5 N / cm using a stainless steel knife and a urethane bed with a blade thickness of 0.1 mm at the contact portion. Coating was performed. Thereafter, heat treatment was performed at 180 ° C. for 60 seconds using a pin tenter dryer to obtain an air bag base fabric having a resin coating amount of 15 g / m 2 . The obtained air bag base fabric has 89% resin-occupying area ratio at the entangled interface where warp and weft intersect, and has a low coating amount of 15 g / m 2. It was excellent in strength, flexibility, and air barrier properties.

[比較例1]
丸断面のナイロン66繊維、470dtex/72フィラメントの糸を経糸および緯糸として製織し、経糸と緯糸の織密度がともに46本/2.54cmの平織の織物を得た。次いでこの織物を経糸と緯糸の織密度がともに46本/2.54cmを保持するようにして定法により精練、熱セットをおこなった。次に、粘度15,000mPa・sの無溶剤系シリコーン樹脂にて、接触部における刃の厚さ0.1mmのステンレス製ナイフとウレタン製ベッドを用いて、挟み力6.0N/cmで押し付けてコーティングをおこなった。その後ピンテンター乾燥機を用いて180℃60秒で熱処理をし、樹脂塗布量が12g/mのエアバッグ用基布を得た。得られたエアバッグ用基布は、経糸と緯糸が交差する交絡部界面において、樹脂の占める面積比率が83%であった。このエアバッグ用基布は柔軟性、空気遮蔽性には優れているものの、難燃性・滑脱抵抗力が劣るものであった。
[Comparative Example 1]
Nylon 66 fibers having a round cross section and 470 dtex / 72 filament yarn were woven as warps and wefts to obtain a plain weave fabric in which the weft and weft density was 46 / 2.54 cm. Next, this fabric was scoured and heat-set by a conventional method so that the woven density of warp and weft was both 46 / 2.54 cm. Next, with a solvent-free silicone resin having a viscosity of 15,000 mPa · s, using a stainless steel knife having a blade thickness of 0.1 mm and a urethane bed at the contact portion, it was pressed with a sandwiching force of 6.0 N / cm. Coating was performed. Thereafter, heat treatment was performed at 180 ° C. for 60 seconds using a pin tenter dryer to obtain a base fabric for an air bag having a resin coating amount of 12 g / m 2 . In the obtained airbag fabric, the area ratio of the resin was 83% at the interlaced interface where the warp and the weft intersect. Although the airbag fabric was excellent in flexibility and air shielding properties, it was inferior in flame retardancy and sliding resistance.

[比較例2]
実施例1で製織、精練、熱セットを行った織物と同じ織物を用いて、接触部における刃の厚さ0.1mmのステンレス製ナイフを用いてフローティング方式にてコーティングをおこなった。使用した樹脂は、粘度15,000mPa・sの無溶剤系シリコーン樹脂である。その後、実施例1と同じ条件で熱処理を実施し、樹脂塗布量が12g/mのエアバッグ用基布を得た。得られたエアバッグ用基布は、経糸と緯糸が交差する交絡部界面において、樹脂の占める面積比率が77%であった。このエアバッグ用基布は柔軟性、空気遮蔽性、難燃性には優れているものの、滑脱抵抗力が劣るものであった。
[Comparative Example 2]
Using the same woven fabric that was weaved, scoured, and heat-set in Example 1, coating was performed by a floating method using a stainless steel knife having a blade thickness of 0.1 mm at the contact portion. The used resin is a solvent-free silicone resin having a viscosity of 15,000 mPa · s. Then, heat processing was implemented on the same conditions as Example 1, and the base fabric for airbags whose resin application amount is 12 g / m < 2 > were obtained. In the obtained airbag fabric, the area ratio of the resin was 77% at the interlaced interface where the warp and the weft intersect. This airbag fabric was excellent in flexibility, air shielding properties, and flame retardancy, but was inferior in sliding resistance.

[比較例3]
実施例1で製織、精練、熱セットを行った織物と同じ織物を用いて、ローラー上に織物を通し、任意の隙間幅でセットされたナイフにより、ナイフオンロール方式にてコーティングをおこなった。使用した樹脂は、粘度15,000mPa・sの溶剤系シリコーン樹脂であり、ナイフは一般にJ刃と呼ばれるもので接触部における刃の厚さは10mmであった。その後、実施例1と同じ条件で熱処理を実施し、樹脂塗布量が20g/mのエアバッグ用基布を得た。得られたエアバッグ用基布は、経糸と緯糸が交差する交絡部界面において、樹脂の占める面積比率が43%であった。このエアバッグ用基布は柔軟性、空気遮蔽性には優れているものの、難燃性と滑脱抵抗力が劣るものであった。
[Comparative Example 3]
Using the same fabric as the fabric weaved, scoured, and heat-set in Example 1, the fabric was passed over a roller, and coating was performed by a knife-on-roll method using a knife set with an arbitrary gap width. The resin used was a solvent-based silicone resin having a viscosity of 15,000 mPa · s. The knife was generally called a J blade, and the thickness of the blade at the contact portion was 10 mm. Then, heat processing was implemented on the same conditions as Example 1, and the base fabric for airbags whose resin application amount is 20 g / m < 2 > were obtained. In the obtained airbag fabric, the area ratio of the resin was 43% at the interlaced interface where the warp and the weft intersect. Although the airbag fabric was excellent in flexibility and air shielding properties, it was poor in flame retardancy and slip resistance.

Figure 0005044168
Figure 0005044168

本発明のエアバッグ用基布において、経糸を取り除き、交絡部界面に樹脂が95%の面積比率で分布していることを示す図である。In the base fabric for airbags of this invention, it is a figure which removes warp, and shows that resin is distributed by the area ratio of 95% in the entanglement part interface. 従来技術によるエアバッグ用基布で、経糸を取り除き、交絡部界面に樹脂が43%の面積比率で分布していることを示す図である。It is a figure which shows that the warp is removed by the base fabric for airbags by a prior art, and resin is distributed by the area ratio of 43% in the entanglement part interface.

符号の説明Explanation of symbols

A、B:交絡部界面

A, B: Interlaced part interface

Claims (4)

合成繊維織物の少なくとも一方の面が樹脂で被覆されたエアバッグ用基布であって、該合成繊維織物の経糸と緯糸が交差している交絡部界面において該樹脂が85%以上の面積比率で分布していることを特徴とするエアバッグ用基布であって、樹脂の塗布量が20g/m 以下であるエアバッグ用基布A base fabric for an airbag in which at least one surface of a synthetic fiber fabric is coated with a resin, and the resin is in an area ratio of 85% or more at the interface of the entangled portion where the warp and weft of the synthetic fiber fabric intersect A base fabric for airbags, wherein the base fabric for airbags has a resin coating amount of 20 g / m 2 or less . 樹脂がシリコーン化合物であることを特徴とする請求項1に記載のエアバッグ用基布。 The base fabric for an air bag according to claim 1, wherein the resin is a silicone compound. 請求項1および2のいずれかに記載のエアバッグ用基布を用いたエアバッグ。 The airbag using the base fabric for airbags in any one of Claim 1 and 2 . 合成繊維織物の少なくとも一方の面が樹脂で被覆されたエアバッグ用基布の製造方法であって、ナイフオンベッド方式により、挟み力0.5〜4.0N/cm、樹脂量20g/mA method for producing an air bag base fabric in which at least one surface of a synthetic fiber fabric is coated with a resin, and a pinching force of 0.5 to 4.0 N / cm and a resin amount of 20 g / m by a knife-on-bed method. 2 以下にて樹脂を塗布し、該合成繊維織物の経糸と緯糸が交差している交絡部界面において該樹脂が85%以上の面積比率で分布させるエアバッグ用基布の製造方法。The manufacturing method of the base fabric for airbags by which resin is apply | coated below and this resin is distributed by the area ratio of 85% or more in the entanglement part interface where the warp and the weft of this synthetic fiber fabric cross | intersect.
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CN2007800314789A CN101506430B (en) 2006-08-24 2007-08-23 Base fabric for airbag and airbag
US12/376,933 US8722550B2 (en) 2006-08-24 2007-08-23 Base fabric for air bag, method of producing the same and air bag
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